Oho, that's a good question. One of the many [lol, only?] questions in an upcoming FAQ. ...Which may or may not just end up being this thread.

KHATAM - The word simply means Final (part/portion)/ Conclusion/ End, etc. in Hindi, Arabic, and another language I think..Urdu? Probably some more as well. But most importantly, it looks/sounds cool. (Another variant definition is Seal - not the animal).